Improvement in fire-extinguishers



UNITED A STATES PATENT orrrea ,AMZI s. DODD AND ISAAC c. ANDREWS, OF NEW YORK, N. Y, Assienons TO HOME FIRE EXTINGUISHER COMPANY, OF SAME PLACE.

IMPROVEMENT lN FlRE-EXT|NGU|SHER-S.

Specification forming part of Letters Patent No. 184,068, dated November 7, 1876; application filed April 18, 1876.

To all whom it may concern Be it known that we, AMZI S. DODD and ISAAC G. ANDREWS, of the city, county, and State of New York, haveinvented a new and Improved Fire Extinguisher, of which the following is a specification:

Figure l is a detail vertical section of the upper part of a fire-extinguisher. Fig. 2 is a detail section, showing the manner of closing the bottle.

The object of this invention is to improve the construction of the mechanism by which the gas-generating ingredients are brought together in a fire-extinguisher.

The invention consistsin the ribs or projections formed upon the inner sides of the bars of the cage,'or equivalent spring attached to said cage, to receive the ring-rib formed upon the outer surface of the bottle, and support said bottle; and in the combination of a stopper with the stem and the hell, or equivalent device for closing the bottle, in such a way that it may drop away from said stopper when forced down through the cage, as hereinafter fully described.

Similar letters of reference indicate corresponding parts.

A represents a can or cylinder of a fire-extinguisher, in the top of which is formed a hole, into which is inserted, from the inside of the said can, a male screw, B. The screw B has an outwanlly-projecting flange formed around itsinner end, which rests against, and is soldered, or otherwise closely secured, to the top of the can A, against which it rests. 0 is a female screw which screws upon the screw B. This construction allows a packing to be placed at the upper end of the male screw 13, and at the lower end of the female screw 0. Both of these pa'ckings may be used, but the upper one will generally be sutficient.

To the outer side of the female screw 0' tom, and with a flange or shoulder around its upper end, which rests upon a flange, shoulder, or other projections formed upon the inner surface of the male screw B.

Upon the inner sides of the bars of the inclined projections m, upon which rests a ring-rib, or depression, Z, formed. upon the outer surface of the bottle L, as shown in Fig. l, to support the said bottle.

' The same thing may be accomplished, in substantially the same way, by attaching a spring to'the cage, M, to receive the rib or a depression of the bottle L.

To the bottom of the cavity of the bell K, or to the lower end of the stem 1 within said cavity, is attached a stopper, N,'1nade of metal or other suitable material, which rests upon, or in the mouth of the bottle L, and closes it tightly.

With this construction, as the leverE is operated to force down the stem I and bell K, the said bell forces the bottle L downward, causing the bars of the rack M to spring outward, and allowing the bottle L to drop through the open bottom of the said rack to the bottom of the can A. The bottle L is connected with the cages M by a chain, 0,

so that it maybe drawn out'of the can A by upon the outer surface of the bottle L, and the cage M, substantially as herein shown support said bottle, substantially as herein and described. e

shown and described. AMZI S. DODD.

2. The combination of a stopper, N, with the ISAAC G. ANDREWS.

stem I and thebell K device for closing the Witnesses:

bottle L in such a Way that it may drop away JAMES T. GRAHAM,

from said stopper when forced down through ALEX. F. ROBERTS. 

